Mystery objects

More mystery objects for you to ponder over.

The first is part of George's Marvelous Machine. As you can see it incorporates a crank and a curious, conical drum. Could the drum be intended as a kind of variable gear for a belt-drive?

PB14CDM#080

PB14CDM#080

Second is a piece of 18th century timber with a carpenter's mark upon it. We'd like to identify the mark if we can. if you have any suggestions we'd be happy to hear them.

Timber inscribed with carpenter's mark